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Improving the energy efficiency of existing wind farms

16.08.2022

Modeling and testing have shown that almost any wind farm can increase its energy efficiency if each individual turbine is operated as an integral part of the entire array, and not as a separate object. The technology was proposed by scientists at the Massachusetts Institute of Technology and is ready to broadcast it for any current and future wind farm projects.

Today, wind turbines produce about 5% of electrical energy in the world. The vast majority of them are part of large wind farms with dozens or even hundreds of turbines whose air turbulences can influence each other. Obviously, if the mutual influence of turbines is taken into account, then the total work of the entire field of wind generators can be optimized, which was studied by MIT specialists together with colleagues from other institutes.

Looking ahead, we note that optimization in terms of the combined effect of wind turbines on the generation of wind turbines makes it possible to increase the generation of each turbine by 1,2 at any wind strength and by 3% at the optimal wind strength (from 6 to 8 m/s). With all the wind turbines installed worldwide, this translates into a tangible result of 31 TWh of additional and virtually free electricity generation per year or $950 million in additional revenue for operators, equivalent to installing 3600 new wind turbines.

Managing each turbine in the interests of the entire array will solve another problem - significantly reduce the area allocated for wind farms. In the ideal case, wind generators should be located as far apart as possible in order to exclude the mutual influence of turbulent air flows on the blades. The strategy of controlling the angle of rotation of each turbine, even to unfavorable values for it, taking into account all the wind turbines and the entire fleet, allows wind generators to be located very, very tightly, which saves space and reduces associated costs.

The researchers tested their strategy on a private wind farm in India. Mathematical calculations are fully justified. Scientists are confident that the model they proposed can optimize the energy efficiency of any existing or future wind farm. Each farm will have its own efficiency in optimization, which depends on many factors, but on average, each of them will be able to work 1,2-3 better.

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